The probability that no units are in the system P o=1- ( / )
where is the mean number of arrivals per time period (the arrival
rate) and is the mean number of services per time period (the
service rate)The average number of units in the waiting line L q= 2
/ (- )The average number of units in the system L =L q+ / The
average time a unit spends in the waiting line W q=L q/
The average time a unit spends in the system W=Wq+1/The
probability that an arriving unit has to wait for a service Pw=
/The probability of n units in the system Pn= (/) n P o
